Gravitational resistant positional chair

Abstract

A desk chair particularly designed to have supporting members disposed between guide members having facing complementary grooves, and the supporting members having supporting rollers riding in said grooves whereby the chair responds to movement of the body to retain it in a good posture position, the only force present in said structure being that of gravity.

What is claimed is: 
     
       1. A desk chair structure, comprising a back rest integral with a seat,   a pair of laterally spaced slide members supporting said seat,   said slide members each being disposed between a pair of closely spaced apart guide members,   each pair of said guide members having an arcuate groove in each of the facing sides thereof, said grooves being longitudinally staggered, non-coextensive, non-conforming manner and having laterally spaced overlapping inward end portions,   said slide members having means engaged in said grooves and being relatively movable therein,   whereby seat movement provides a correct posture position for each body movement of a seated person.   
     
     
       2. The structure of claim 1, wherein said grooves respectively have an increased upward curvature at their said overlapping portions.   
     
     
       3. A desk chair structure, comprising a back rest integral with a seat,   an outward and a closely spaced inward guide member underlying each opposed side of said seat comprising first and second pairs of guide members,   said inward guide members being positioned relatively forwardly of said seat and said outward guide members being positioned relatively rearwardly of said seat,   said outward guide members having corresponding arcuate grooves therein facing their respective inward guide members and having a longer upward curvature forwardly of said seat than rearwardly thereof,   said inward guide members having corresponding arcuate grooves therein facing their respective outward guide members and having a longer upward curvature rearwardly of said seat than forwardly thereof,   said curvature of said grooves of said outward guide members being longitudinally staggered and non-conforming relative to said grooves of said inward guide members,   said curvature of said grooves of said outward and inward pairs of guide members respectively having laterally spaced overlapping inward end portions,   seat supporting slide members respectively disposed between the outward and inward guide members of each pair thereof and having engagement with the grooves thereof for relative movement therebetween,   whereby said seat moves readily to provide a correct posture position for each body movement of a seated person.